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Hive, mail # dev - number of buckets in bucket map join


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Mahsa Mofidpoor 2012-10-31, 23:50
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Mark Grover 2012-11-01, 14:49
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Re: number of buckets in bucket map join
Namit Jain 2012-11-01, 03:47
The number of mappers is the greater common factor for all the tables.
So, it it is not a multiple, a single mapper will be assigned.
On 11/1/12 5:20 AM, "Mahsa Mofidpoor" <[EMAIL PROTECTED]> wrote:

>Hi,
>
>Hive summit 2011 says for performing a bucket join the number of buckets
>of
>all tables has to be a multiple of each other.
>Does anybody know the reason?
>
>Thanks you.
>Mahsa